Question

If neon has an atomic number of 10 and an atomic mass of 20, how many neutrons does it have?.

Answer 1

10

Explanation

Atomic number is the amount of protons, there is an equal amount of neutrons as protons. Atomic mass is about 1 (Dalton) for both a proton and neutron. Electrons are so tiny they barely affect atomic mass at all.

Answer 2

10

Step-by-step explanation:

(20) which is the atomic mass you subtract it from the mass number to get 10